Horace wyman



model.)

H.WYMAN. Loom.'

No. 235,975. Patented Dec. 28, 1880 SVH EEEES.

. UNTTED STATES PATENT @rrrcn.

HORACE WYMAN, OF \VORGESTER, MASSACHUSETTS.

LOOM.

SPECIFICATION forming part of Letters Patent No. 235,975, dated December28, 1880.

Application filed March 5,1880. (ModeL) the shaft or drum that supportsand moves the shuttle-box pattern-cylinder surface or chain will beautomatically and instantly stopped whenever the weft or filling isbroken, such contrivance acting to stop the motion of the shuttle-boxpattern-surface sooner than could be done when the said pattern-surfaceis stopped only as the crank-shaft is stopped, for

by this latter and common plan the momentum of the loom, after theshipper operates to stop the loom, is usually sufficient to run the loomfor one or two picks.

' My invention consists, essentially, in the combination, with any usualweft-feeling devices and the sleeve or shaft carrying the shuttle-boxpattern-surface, of rotating clutching mechanism havingapinion engagedand driven by a pinion on the crank or other suitable rotating shaft ofthe loom, and intermediate de vices between the weft-feeling devices andthe said clutch to automatically operate the clutch to release the saidshaft that moves the shuttle-box pattern-surface from the control of therunning parts of the loom upon the breaking or absence of the weft, orwhen the weft becomes too slack.

Figure 1 represents, in side elevation, a sufficient portion of a loomto illustrate my improvement; Fig. 2, a partial side elevation andsection, showing the parts in a different position; Fig. 3, details ofone form of clutching mechanism for placing the shuttle-boxpatternsurface under or releasing it from the control .of the crank orother positively-driven shaft of the loom; and Fig. 4 a detail with thepattern-chain added.

In the drawings, a is the usual crank-shaft, and b a pinion thereon.This crank-shaft tlS intended to be like, and to be actuated in the samemanner as, he crank-shaft in United States Patent No. 142,441. Thispinion engages and drives a toothed gear, 0, placed loosely on astud,d,held in a suitable bracket or stand, 6, at the loom side f. Atthe side of this toothed gear is a collar, g, having in it a notch, 2,which,when the loom is in regular operation and the filling is beingproperly laid by the usual shuttles, is engaged by the clutching-pawl h,pivoted at 3 on the disk 1, loose on the stud d, a spring, j, acting tokeep the said pawl in the said notch. This notched collar g, pawl h,disk 4., and spring j form what I herein denominate the clutch orclutching mechanism for the shuttle-box pattern,- surface but,instead ofthe particular devices shown, it will be understood that any otherwell-known suitable clutch mechanism which will operate in the samemanner may be employed. I have placed at the side of the said disk t apin-wheel contrivance, l, and one or more pins, 5, according as it isdesired to turn the pattern-surface one or more picks to each revolutionof the cam-shaft, one pin being herein used to insure a movement of thesaid pattern-surface for every two picks, for the pin-wheel is so timedas to make one while the crank-shaft makes two revolutions; but with twopins, one directly opposite the one 5, in the position indicated by thecircle 6, Fig. 1, the pattern-cylinder wouldwmove one step at eachsemi-revolution of the pin-wheel, and consequently at each rotation ofthe crankshaft.

, The pattern-surface which I prefer to employ will be the chain m(shown in Fig. 4,) it being carried by the shaft or hollow sleeve orcylinder m, placed on the stud n, the sleeve having the usual notcheddisks 0, which receive the bars of the pattern-chain. Upon this sleeve,at one end, is the star-wheel p, notched to form teeth which at theirouter ends are concaved, the notches to be entered by the pin 5 and theconcaves to act in succession upon the disk I after the said pin passesfrom each of the said notches, totthus prevent further rotation of thepattern-surface with the said disk and crank-shaft.

The bar 0", fitted to slide in the stand b of the breast-beam t, haspivoted upon it at 8 the usual tilting fork to, which, as the lay ismoved forward to beat in the filling, causes the weft, if present on theusual grid, to act upon and tilt the said fork, elevating its hookedrear end above the path of movement of the vibrating lever to, (seedotted lines, Fig. 1,) which, in

practice, will be moved once during each rotation of the cam-shaft by acam, as indicated by dotted lines g, on a suitable cross or cam shaft, a

At the rear of the slide-bar a" is an arm, 10, of a rockshaft, 11,having another arm, 12, which, at or near its lower end, has aprojection to act upon and lift the lever-holder N, which, as hereinshown, is loosely mounted upon the shaft 11, the lower end of the saidlever-holder being suitably notched to engage apin or projection, 13, onthe stopping-lever 14, pivoted at 15. The rear end of this lever 14,near the clutch mechanism for the shuttle-box patternsurface, isnotched, and at the proper time strikes the head at of the pawl andlifts it from the notch 2 in the collar g, leaving the pinwheel looseand the shaft or sleeve that carries the pattern-surface at rest,notwithstanding movement of the crank-shaft after such disengagement.

The devices 0', a, 10, and 12 constitute what I shall hereinafter callthe weft-feeling mechanism; but instead of the special devices shown Imay employ any usual weft feeling devices.

When the weft is being properly laid and the fork is tilted at everyother forward movement or beat-up of the lay, all in the usual manner,the lever-holder b acts to hold the stopping-lever 14L lifted, as inFig. 2. When the weft fails and the fork is not tilted the lever 20strikes the rear end, 20 of the fork, (shown in dotted lines, Fig. 1,)carries back the slide 1*, turns the rock-shaft 11, and lifts the holderZ), when the spring 0 (shown in Fig. 1) turns the said lever so that itsnotched end (1 is placed in position to strike the top 4 of the pawl 71,disengage it quickly from the gear 0 and collar, then, being driven bythe crankshaft, instantly leaving the disk, pin-wheel, andpattern-surface at rest, and completely stopping the rotation of thesame, notwithstanding the lay may, from its momentum, move sufficientlyto produce one or two picks. As soon as the end 4 of the pawl strikesthe end d of the lever 14, said end being preferably inclined, as shown,the end (1 of the said lever is lifted far enough to permittheloosely-mounted holding-arm b to drop by its own weight over the pin13 and hold the lever 14, as in Fig. 2. Now, when the loom is againstarted the pawl will drop into the notch 2 as soon as the said notch,in the rotation of the hub g, arrives under it, which instantly permitsthe pin-wheel to start up and the pattern-surface to be again actuatedautomatically.

The lever-holder b may, if desired, be provided with a hole, 18, inwhich will be attached a cord, D or wire, joined, as shown in Fig. 3,with a Jacquard lifting-wire, b of usual construction, thus placing thesaid lever-holder under the control of a Jacquard, to thereby move theholder to release the lever 14 at suitable intervals, according to thepattern of the cloth being woven.

The holder may be operated by hand, should it be desired to do so.

The pawl 71, can only be connected or disconnected at the position shownin the drawings, while the lever-holder b can be operated upon by eitherthe filling stop-motion or by an auxiliary pattern-surface at anypointof the revolution, as may suit the convenience of the operation ofsuch stop-motion or pattern-surface; or it may be operated by hand, andwhen the pawl arrives at the point shown in the drawings the connectingor disconnecting takes place.

The pin-wheel Z, in practice, may be kept in place by a slight spring, 1bearing on its surface.

I am aware that itis not new to connect the shuttle-box pattern-surfacewith and so as to be stopped by the absence of the weft; but in all suchcases, so far as 1am aware, the shuttlebox pattern-surface has beenmoved by a reciprocating pawl and ratchet-wheel, the said pawl beingoperated by a cam or eccentric on a running shaft of the loom, and beinglifted at its free end from the said ratchet when the filling-forkcarrier was moved backward. With a pawl of this kind, if the loom isturned backward part of a revolution, or more, as is frequentlynecessary to be done by the operator when the loom is stopped and thefilling unbroken, as when preparing the shed to mend a warp-thread, thesaid pawl may engage a tooth of the said ratchet and turn the shuttleboXpattern forward when it should be turned backward, consequently disarrangi n g the pattern.

In this my apparatus one part of the clutch mechanism always turns inunison with the crank-shaft, and the other part of the clutch mechanismturns in unison with the said crankshaft when the pawl of the clutchoperates to hold the two parts of the clutch in engagement.Consequently, when the loom is turned backward, as hereinbefore statedas necessary at times, the pattern-surface for the shuttle-box is movedbackward according to the extent of backward movement of thecrank-shaft, thus keeping the said pattern-surface in correct time.

1 do not claim releasing the cams that operate the harness to stop themovement of the harness-frames when a weft is not laid in place betweenthe warps, as such a contrivance is described in United States PatentNo. 79,923.

I have not considered it necessary to herein show a shuttle-boxmechanism, as any usual shuttle-box mechanism may be employed such, forinstance, as in the patent referred to. Fingers such as therein'shownmay be em ployed in connection with the devices herein shown, the saidfingers being extended over the cylinder m and chain m thereon, the saidfingers being connected by wires with pawls to actuate theshuttle-box-lever moving cam, all as in the said patent.

I claim- 1. In a loom, the weft-feeling mechanism and shuttle-boxpattern-surface-movin g shaft, the shaft a, and means to connect thesaid two shafts and rotating clutch mechanism, combined with meansintermediate between the weft feeling mechanism and the clutchingmechanism to instantly release the shuttle-box pattern-surface from thecontrol of the shaft a,

whereby the shuttle-box pattern-surface is connecting the same with ordisconnecting it from the control of the shaft a, means intermediatebetween the said pattern-surface-moving sleeve or shaft and clutchingmechanism to move the said shuttle-box pattern-surface, a stop-lever toact upon and release one part of the clutching mechanism to therebycheck the movement of the pattern mechanism at a definite pointin itsown rotation, as described,- and a lever-holder by which to operate thesaid stop-lever at any desired time, all being adapted to operatesubstantially as and for the purpose described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

- HORACE WYMAN. Witnesses J. B. SYME, J. A. WARE.

